backup.pya simple way to do diff and complete backups for your servers

Some days ago i'm looking for a simple way to do daily backups in my server. I found a lot of software BUT is too
simple OR too complete for my needs. So i decide to wrote a small python class to do that. And here is backup.py:
it takes a list of directories and do diff backups on there. At the end it send a mail report. Nothing more and nothing less
and it does it work well in my home and office enviroments !